एक विभवमापी परिपथ में 1.5 V EMF की एक सेल 30 cm तार के लम्बाई पर संतुलित बिन्दु देती है। यदि 2.5 V EMF वाली दूसरी सेल पहली सेल को प्रतिस्थापित करती है, तो तार के किस लम्बाई पर संतुलित बिन्दु प्राप्त होगा?

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HPCL Engineer Electrical 01 Nov 2022 Official Paper
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  1. 50 cm
  2. 30 cm
  3. 60 cm
  4. 40 cm

Answer (Detailed Solution Below)

Option 1 : 50 cm
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)सही उत्तर विकल्प 1 है। :(50 cm)

संकल्पना:

जैसा कि हमें ज्ञात हैं कि एक विभवमापी में EMF में दो सेल होते हैं जिनमें और ℓ2 शून्य बिंदु हैं और  Eऔर  EEMFs हैं, इसलिए हम इसे इस प्रकार लिख सकते हैं,

\(\frac{{{E_1}}}{{{E_2}}} = \frac{{{\ell_1}}}{{{\ell_2}}}\)

गणना :

दिया :

E= 1.5 V

E2 = 2.5 V

l1 = 30 cm

l2 = ?

\(\frac{{{E_1}}}{{{E_2}}} = \frac{{{\ell_1}}}{{{\ell_2}}}\)का प्रयोग करके हमें प्राप्त होगा;

l2 = l× \(E_2 \over E_1\)

= 30 × \(2.5 \over 1.5\)

= 50 cm

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